I use the following method to draw a topographic map：evoked.plot_topomap(np.arange(0.5, 4.0, 0.25),ch_type=‘eeg’,sensors=False,res=32,scalings=dict(eeg=1),contours=0,outlines=‘skirt’,time_unit=‘s’,nrows=2)
The resulting image is as follows：
The image generated in the example(Plotting topographic maps of evoked data — MNE 0.23.0 documentation) is as follows:
Compared to the picture in the example, I think my topographic map is messy.
I think there may be two reasons. The first reason is that the position of the channel is wrong. The second reason is that the smoothness of the image is not adjusted. However, I did not find this parameter in plot_topomap. Where can I change it?